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|Applied Standard:||IEC 60990||Applied Figure:||Figure 5|
|Applied Another Standard:||IEC 62368-1 And Etc.||Applied Another Clause:||Clause 22.214.171.124|
Current Measuring Circuit Test Equipment,
IEC60990 Current Measuring Circuit Test Equipment
IEC 60990 Figure 5 Touch Current Measuring Circuit Test Equipment
This test network conforms to the measuring network requirements of IEC 60990 figure 5 touch current and the measurement method of protective conductor current,
(Figure 5- Measuring network, touch current weighted for letgo-immobilization), it is required by IEC 62368-1:2018 clause 126.96.36.199, etc.
An electrical energy source class is determined from both the voltage and the current under normal operating conditions, abnormal operating conditions, and single fault conditions.
Before testing, you need to prepare instruments as follow:
One or ten times the voltage probe x1
Power supply x1 (the test voltage or frequency that can be adjusted or changed to the required voltage or frequency)
1. During the test, it is necessary to pay attention to safety because you can touch some terminals.
2. According to IEC 60990 standard requirements, the power supply must be in isolation, and zero line and ground wire must be connected together. (the simple way is to whether there exists voltage on zero line and ground wire, if voltage surpass 2V, such as 220V power, the different voltage between zero line and ground wire more than 100V, the zero line and ground wire must be connected.)
3. When testing, please pay attention to the polarity of the power supply. The fire line must be connected to the L end of the contact current test conversion switch. If the connection is wrong, there is a danger of electric shock.
4. Connect the oscilloscope, test the sample, then connect the power after b-terminal line, and do not connect the test line when the power is connected.
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